公开(公告)号：US07271575B2

公开(公告)日：2007-09-18

申请号：US10637901

申请日：2003-08-07

申请人： John J. Pickerd ,  Laudie J. Doubrava

发明人： John J. Pickerd ,  Laudie J. Doubrava

IPC分类号： G01R23/00 ,  G01R23/16 ,  G01R27/06

CPC分类号： G01R13/22

摘要： A system, apparatus and method for performing differential return loss measurements and other measurements as a function of frequency uses a digital storage oscilloscope (DSO) having spectral analysis functions. A waveform generator generates a differential test signal in the form of a series of pulses where each pulse includes spectral components associated with each of a plurality of frequencies of interest. A test fixture presents the differential test waveform to a load including at least one of a device under test (DUT), a short circuit, an open circuit and a balanced load. A signal acquisition device differentially measures the test waveform during each of the load conditions. The signal acquisition device computes an error correction parameter using measurements made during the short circuit, open circuit and balanced load conditions. The correction parameter tends to offset signal acquisition errors within measurements made during the DUT load condition.

摘要翻译： 用于执行差分回波损耗测量和作为频率的函数的其他测量的系统，装置和方法使用具有频谱分析功能的数字存储示波器（DSO）。 波形发生器以一系列脉冲的形式产生差分测试信号，其中每个脉冲包括与感兴趣的多个频率中的每一个相关联的频谱分量。 测试夹具将差分测试波形呈现给包括被测器件（DUT），短路，开路和平衡负载中的至少一个的负载。 信号采集装置在每个负载条件下差分地测量测试波形。 信号采集装置使用在短路，开路和平衡负载条件下进行的测量来计算纠错参数。 在DUT负载条件下进行的测量中，校正参数倾向于抵消信号采集误差。

公开(公告)号：US06697754B1

公开(公告)日：2004-02-24

申请号：US09634160

申请日：2000-08-09

申请人： Jay A. Alexander

发明人： Jay A. Alexander

IPC分类号： G06F1560

CPC分类号： G01R13/22

摘要： An apparatus and method for providing an end-user operator with the ability to assign temporary control of a set of one or more operator-specified instrument control operations to one, single-action switch on a signal measurement system front panel. The assigned instrument control operations are preferably represented by text strings in a macro text file that is developed and modified with the use of a text editor integrated into or operatively coupled with the signal measurement system.

摘要翻译： 一种用于向最终用户操作者提供将一组一个或多个操作员指定的仪器控制操作的一组临时控制分配给信号测量系统前面板上的一个单动作开关的装置和方法。 分配的仪器控制操作优选地通过使用集成到信号测量系统中或与信号测量系统可操作地耦合的文本编辑器来开发和修改的宏文本文件中的文本串表示。

公开(公告)号：US5025411A

公开(公告)日：1991-06-18

申请号：US939645

申请日：1986-12-08

申请人： James L. Tallman ,  Terry G. Sherbeck

发明人： James L. Tallman ,  Terry G. Sherbeck

IPC分类号： G06F3/042 ,  G01R13/22 ,  G01R13/34 ,  G06F3/033 ,  G06F3/041 ,  G06F3/048

CPC分类号： G06F3/033 ,  G01R13/22 ,  G01R13/347

摘要： A system for providing input to a computer comprises a touchscreen apparatus for generating a grid of horizontal and vertical light beams and producing a set of output signals, each indicating whether a corresponding one of the light beams strikes an object. A scanning device repeatedly scans the states of the output signals, stores data representing the last scanned state of each output signal, and transmits a first interrupt signal to the computer whenever the state of any one of the output signals changes. In response to the interrupt signal, the computer reads the stored scan data, determines whether the data indicates that a horizontal and a vertical light beam is striking an object, and if so, sets parameter values to identify the horizontal and vertical light beams. In response to a second interrupt signal periodically generated by a clock, the computer determines whether or not the parameter values have remained constant for a predetermined period, and if so executes a routine responsive to the parameter values.

摘要翻译： 用于向计算机提供输入的系统包括用于产生水平和垂直光束的网格并产生一组输出信号的触摸屏设备，每个输出信号指示对应的一个光束是否撞击物体。 扫描装置重复地扫描输出信号的状态，存储表示每个输出信号的最后扫描状态的数据，并且每当输出信号中的任一个的状态改变时，将第一中断信号发送到计算机。 响应于中断信号，计算机读取存储的扫描数据，确定数据是指水平和垂直光束是否被击中物体，如果是，则设置参数值以识别水平和垂直光束。 响应于由时钟周期性地产生的第二中断信号，计算机确定参数值是否在预定时间段内保持不变，并且如果执行响应于参数值的例程。

公开(公告)号：US4801851A

公开(公告)日：1989-01-31

申请号：US418190

申请日：1982-09-14

申请人： Bernard M. Gordon ,  Colin Gyles

发明人： Bernard M. Gordon ,  Colin Gyles

IPC分类号： G01R13/22 ,  G01R13/34 ,  H01J29/70 ,  H01J29/76

CPC分类号： G01R13/22 ,  G01R13/34

摘要： A memory control for use with a digital oscilloscope having a display and a digital memory storing a sequence of signal samples. The sequence of signal samples is cyclically read from memory and displayed. The memory control adjusts the memory access operation to provide a controlled signal flow to the display at a rate within the slew-rate limits of the graphic display. In the memory control, the point slew, or distance over which the display beam moves from the present data point to the next point, is measured. If the point slew relative to the time interval between displayed signal samples exceeds the slew-rate capability of the display, the signal flow from the memory for subsequent data points is reduced or inhibited for a time sufficient to allow the display to reach a coordinate position corresponding to the desired data point.

摘要翻译： 一种与具有显示器和数字存储器存储信号样本序列的数字示波器一起使用的存储器控​​制。 信号样本的序列从存储器循环读取并显示。 存储器控制调节存储器访问操作，以图形显示的转换速率限制内的速率向显示器提供受控信号流。 在存储器控制中，测量点摆动或显示光束从当前数据点移动到下一点的距离。 如果相对于所显示的信号样本之间的时间间隔相对于点的转速超过显示器的转换速率能力，则来自用于后续数据点的存储器的信号流被减少或抑制足以允许显示器到达坐标位置的时间 对应于所需的数据点。

公开(公告)号：US4743845A

公开(公告)日：1988-05-10

申请号：US908551

申请日：1986-09-17

申请人： Calvin D. Diller ,  Douglas C. Stevens

发明人： Calvin D. Diller ,  Douglas C. Stevens

IPC分类号： G01R13/30 ,  G01R13/22 ,  G01R13/20

CPC分类号： G01R13/22

摘要： In an oscilloscope, a readout control circuit is adapted to create a horizontal cursor on an oscilloscope screen at a vertical level controlled by cursor level data generated by a microcomputer, and to cause the beam to form characters on the screen indicating a voltage represented by the vertical level of the cursor. Vertical offset and vertical gain parameters characterizing a vertical preamplifier system controlling display of a waveform are measured and utilized to determine the value of cursor level data needed to cause the readout control circuit to position the cursor on the screen to accurately reflect a selected voltage with respect to voltage magnitudes represented by points on the displayed waveform. The oscilloscope is adapted to measure peak magnitudes of a vertical preamplifier input signal, and the readout control circuit permits the oscilloscope to display a cursor on a screen at a level indicating the magnitude of the measured peak with respect to magnitudes represented by a displayed waveform.

公开(公告)号：US4634970A

公开(公告)日：1987-01-06

申请号：US567055

申请日：1983-12-30

申请人： Randall K. Payne ,  Russell H. Nord

发明人： Randall K. Payne ,  Russell H. Nord

IPC分类号： G01R13/22 ,  G01R13/34

CPC分类号： G01R13/34 ,  G01R13/22

摘要： A raster display digital oscilloscope includes an analog to digital converter and a memory array for developing and storing a digital measurement signal amplitude-dependent on an acquired input signal. After processing stored digital signals are conveyed to an output circuit which includes a raster-scanned CRT and three display memory planes independently addressable by the CPU for receiving in discrete address locations the digital data. Corresponding address locations in the three planes are read in synchronism with the CRT scan to develop a display signal for application to the CRT to produce a display corresponding to the sum of the data stored in the three planes. The digital signals are automatically spread out or bunched up within the display planes to compensate for differences between the data acquisition rate and the scan rate.

摘要翻译： 光栅显示数字示波器包括模数转换器和存储器阵列，用于开发和存储取决于获取的输入信号的数字测量信号。 在处理存储的数字信号之后，传送到包括光栅扫描CRT和三个显示存储器平面的输出电路，该三个显示存储器平面可由CPU单独寻址，以便在离散地址位置接收数字数据。 与CRT扫描同步地读取三个平面中的对应地址位置，以开发用于CRT的显示信号，以产生对应于存储在三个平面中的数据之和的显示。 数字信号在显示平面内自动展开或聚集，以补偿数据采集率和扫描速率之间的差异。

公开(公告)号：US4547709A

公开(公告)日：1985-10-15

申请号：US335365

申请日：1981-12-29

申请人： Jack G. French

发明人： Jack G. French

IPC分类号： G01S7/06 ,  G01R13/22 ,  G01S7/12 ,  G09G1/04 ,  H01J29/76 ,  H01J29/78

CPC分类号： H01J29/76 ,  G01R13/22 ,  G01S7/12

摘要： A cathode ray tube display device having beam deflection coils (8,10,12,14) and means (44 and 46) for applying to inductive means (58 plus the coils) which includes the beam deflection coils a voltage for causing a ramp current to flow in the coils to produce progressive beam deflection, comprising means (52,54,56) for selectively modifying interconnections between the coils to change the inductance presented to the voltage applying means and thus change the gradient of the ramp current and the rate of beam deflection, said interconnection modifying means being operable to change the number of deflection coils through which said current flows.

摘要翻译： 一种具有光束偏转线圈（8,10,12,14）和用于施加到电感装置（58加上线圈）的装置（44和46）的阴极射线管显示装置，其包括光束偏转线圈，用于产生斜坡电流 在线圈中流动以产生渐进的光束偏转，包括用于选择性地修改线圈之间的互连的装置（52,54,56），以改变呈现给电压施加装置的电感，并因此改变斜坡电流的梯度和 所述互连修改装置可操作以改变所述电流流过的偏转线圈的数量。

公开(公告)号：US4529930A

公开(公告)日：1985-07-16

申请号：US291202

申请日：1981-08-10

申请人： Eddie A. Evel ,  Robert M. Landgraf ,  Walter A. Fischer ,  William B. Risley

发明人： Eddie A. Evel ,  Robert M. Landgraf ,  Walter A. Fischer ,  William B. Risley

IPC分类号： G01R13/22 ,  G01R13/34 ,  G01R23/16

CPC分类号： G01R13/22 ,  G01R13/345

摘要： A digitizer circuit for converting analog waveforms displayed upon a CRT screen into digital signals suitable for storage in memory employs a microprocessor to determine, from user-specified parameters, the times at which the output of the CRT vertical amplifier is to be sampled. The user has great flexibility in defining sample resolution and the location of the sample window on the displayed waveform in which the samples are to be taken and is permitted to intensify the sample window on the CRT display before any samples are taken in order to view the sample window in relation to the remainder of a displayed waveform.

摘要翻译： 用于将显示在CRT屏幕上的模拟波形转换为适合于存储在存储器中的数字信号的数字转换器电路使用微处理器从用户指定的参数确定要对CRT垂直放大器的输出进行采样的时间。 用户在将采样分辨率和样本窗口的位置定义在采样的显示波形上具有很大的灵活性，并且在采集任何采样之前允许在CRT显示器上强化采样窗口，以便观察样本 相对于显示波形的剩余部分的采样窗口。

公开(公告)号：US4495642A

公开(公告)日：1985-01-22

申请号：US352672

申请日：1982-02-26

申请人： Joel A. Zellmer

发明人： Joel A. Zellmer

IPC分类号： G01R13/28 ,  G01R13/22 ,  G01R13/32 ,  G01R19/00 ,  G01R31/3177 ,  G06F11/25 ,  H03K5/153 ,  H03K5/26 ,  G06K9/00

CPC分类号： H03K5/26 ,  G01R13/22 ,  G01R13/32 ,  G01R19/0038 ,  G01R31/3177 ,  G06F11/25 ,  H03K5/153

摘要： A timing analyzer incorporates pattern transition and pattern duration triggering. A transition detector detects transitions into or out of selected patterns occurring among the inputs of the analyzer. A time duration comparator compares a selected logical sense of the pattern against a variable duration reference. The outputs of the transition detector and of the time duration comparator are combined with logic circuits to produce a qualified trigger signal indicative of a simple transition into or out of a selected pattern, duration of the pattern longer than some reference, or shorter than that reference.

摘要翻译： 定时分析仪包含模式转换和模式持续时间触发。 转换检测器检测在分析仪的输入之间发生的选定图案的转换。 持续时间比较器将所选择的模式的逻辑感觉与可变持续时间参考进行比较。 转换检测器和持续时间比较器的输出与逻辑电路组合以产生指示进入或退出所选模式的简单转换的限定触发信号，该模式的持续时间长于某个参考，或短于该参考 。

公开(公告)号：US4364036A

公开(公告)日：1982-12-14

申请号：US209488

申请日：1980-11-24

申请人： Kazunari Shimizu

发明人： Kazunari Shimizu

IPC分类号： G01R13/28 ,  G01R13/22 ,  G01R31/3177 ,  G06F11/25 ,  G09G1/08

CPC分类号： G01R13/22 ,  G01R31/3177 ,  G06F11/25

摘要： A combined logic timing and state analyzer comprises an internally clocked, timing analyzer section receiving a first set of logic signals, and an externally clocked, state analyzer section receiving a second set of logic signals. The timing analyzer section samples the first set of logic signals, as well as the external clock signal associated with the second set of logic signals, at a rate determined by the internal clock pulses and stores the samples in a first set of memories. The state analyzer section samples the second set of logic signals at a rate determined by the external clock pulses and stores the samples in a second set of memories. Data introduction into the memories terminates when they are triggered, as in the event of a malfunction of the system being investigated. The logic analyzer further includes a display circuit for repetitively reading out the first and the second sets of memories and for causing a display device to visually present the output data of the first memory set in the form of a timing diagram and the output data of the second memory set in the form of a state table. The time relationship between the two display formats can be readily ascertained since the timing diagram includes a waveform, or other visual representations, indicative of the external clock pulses used for sampling the second set of logic signals.

摘要翻译： 组合逻辑定时和状态分析器包括接收第一组逻辑信号的内部时钟定时分析器部分和接收第二组逻辑信号的外部时钟状态分析器部分。 定时分析器部分以由内部时钟脉冲确定的速率对第一组逻辑信号以及与第二组逻辑信号相关联的外部时钟信号进行采样，并将采样存储在第一组存储器中。 状态分析器部分以由外部时钟脉冲确定的速率对第二组逻辑信号进行采样，并将采样存储在第二组存储器中。 数据引入到存储器当它们被触发时终止，如在被调查的系统发生故障的情况下。 逻辑分析器还包括显示电路，用于重复地读出第一和第二组存储器，并且使得显示装置以时序图的形式可视地呈现第一存储器组的输出数据，并且输出数据 第二个内存以状态表的形式设置。 由于时序图包括指示用于对第二组逻辑信号进行采样的外部时钟脉冲的波形或其他视觉表示，所以可以容易地确定两种显示格式之间的时间关系。